Pumping unit



G. D. LOUD.

PUMPING UNIT.

APPLICATION FILED AUG.8. 1911.

Patented Oct. 25, 1921.

0e 07.- 7%? X L WllfieTss UNITED STATES PATENT OFFICE.

PUMPING UNIT.

Specification of Letters Patent.

Patented Oct. 25, 1921.

Application filed August 8, 1917. Serial No. 185,162.

To (ZZZ whomit may concern:

vBe it known that' I, GEORGE D. Loon, a citizen of the United States, residing at Boston, in the county of Suflolk and State of Massachusetts, have invented certain new and useful Improvements in Pumping Units; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to pumping units and more particularly to units of small and compact construction in which the lmotor and pump are mounted upon a single ase.

The present type of pump has a wide field of usefulness but is especially adapted for handling medium volumes of water under a comparatively high head, as for example, supplying water for household purposes The object of the present invention is to provide an improved pumping unit of this type which is self contained and exceedingly compact in construction and which will operate efiiciently under all conditions of use.

With this object in view a feature of the invention contemplates the provision of a stationary piston secured to the supporting base which carries the internal combustion motor, a cylinder surrounding the piston and sliding thereon, and connections be tween the internal combustion motor and opposite sides of the cylinder for reciprocating the latter.

Still further features of the invention consist in certain novel features of construction, combinations and arrangements of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the artfrom the following description.

In the accompanying drawings illustrating the preferred form of the invention, Figure 1 is an elevation,partly in section, of the improved pumping unit; Fig. 2 is a similar elevation of the pumping unit taken at'right angles to Fig. 1; and Fig. 3 is a detail showing a cross section upon the line 33 of Fig. 1. v

According to the present invention the base of the pumping unit. supports an internal combustion motor of suitable design having a crank shaft operatively connected with .a movable pump cylinder through a pair of links connected to opposite sides of the cylinder causing the latter to reciprocate upon a stationary piston secured to the under side of the motor casing. As will be noted from the drawings, this forms an exceedingly compact and simple construction occupying the minimum amount of floor space.

In the illustrated embodiment of the invention the internal combustion motor is provided with a cylinder 10 having a piston 11 connected to a crank shaft 12 through a connecting rod 14. The cylinder is formed as a separate casting detachably secured to the upper portion of a crank case 15 having bearings 16 formed in opposite sides thereof for the crank shaft 12. The fuel and other necessary requisites for the operation of the motor are conveniently received in a container 17 supported upon the upper portion of the crank case 15, as shown clearly in Fig. 2 of the drawings. The lower portion of the crank case is provided with a plurality of legs 18 having out-turned feet 19 adapted to be secured to a supporting base indicated at 20. From an inspection of Figs. 1 and 2 it will be noted that the supporting base consists of an annular ring 21 having a series of short legs 22 pr jecting therefrom. The legs 18 of the crank case are supported upon the annular ring 21 and secured in place by a series of clamp ing bolts 23.

In order to produce a compa unit one element of the pump is secured to the under side of the crank case and the cor'ipera element of the pump reciprocates relati thereto and is operatively connected with the crank shaft of the motor. In the illustrated embodiment of the invention a sta tionary piston 25 is secured to the under side of the crank case through a bolt 26 extending longitudinally through the piston and,

threaded at its upper end in the crank case. The piston is received within a cooperating cylinder 28 which is reciprocated relative to the piston to cause the passage of water through the pump. The pump comprising the piston and cooperating cylinder depends from the under side of the crank case *ithin the ring 21, as shown clearly in the drawings, and is sufficiently elevated to permit the full vertical stroke of the pump.

The int ake and discharge of water to and from the pump is accomplished in a simple and novel manner by providing a hollow piston having a central longitudinal web 30. The provision of this web forms separate and independent intake and discharge passages 32 and 33, which are connected, respectively, with intake and discharge pipes 34 and 25. It will be noted from an inspection of Fig. 1 that the web has an enlarged central portion 37 which receives the clamping bolt 26. With the above described con struction the downward or suction stroke of the cylinder causes the inflow of water through the pipe 34 and passage 32 filling the cylinder. Upon the upward or pressure stroke of the cylinder the water is forced out through the passage 33 and discharge pipe 35. During the operation of the pump the flow of water through the two pipes is controlled by suitable oheck valvesetO and 41 located in the pipes adjacent their connection with the piston.

tor.

In order to insure against damage to the moving parts of the pump if gravel or dirt should collect in the cylinder a buffer 36 of rubber or other suitable material is inserted at the bottom of the cylinder 28. With this construction if the clearance between the piston and cylinder is not suflicient to accommodate gravel or stones lodged in the cylinder the buffer is compressed by the foreign material without damaging the pump.

The operative connections between the motor and pump conveniently comprise speed reducing means to cause the actuation of the pump at a speed lower than that of the mo- The crank shaft of the motor is provided with a worm 42 mounted thereon at one side of the connecting rod and meshing with a worm gear 43 secured to a cross shaft 44, journaled in opposite sides of the crank case above the crank shaft 12. The opposite ends of the cross shaft 44 project outside the crank case and have cranks 46 secured thereto. The cranks 46 are operatively connected with the cylinder 28 through a pair of links 47 connected at their lower ends to trunnions 4-8 extending laterallv from opposite sides of the cylinder. The links are provided with enlarged and rounded lower ends 50 which slide within flanges 51 formed upon the legs 18 and serving as guides. In

order to prevent leakage of water during the operation of the pump the upper end of the cylinder is provided witha water-tight gasket consisting of a ring 55 threaded upon the cylinder and serving to squeeze a yielding packing 56 against the piston.

It is highly desirable under certain circumstances that the water which is delivered by the pump shall be'heated and according to the present invention the" waste heat from the motor is utilized to warm the water by passing the entire output of the pump through the jacket of the motor. In this manner the waste heat from the motor is not only utilized but the water delivered from the pump is employed as a cooling medium for the motor. It will be noted from an inspection of Figs. 1 and 2 of the drawings that the water delivered by the pump is led into the jacket of the motor through a pipe 60 connected with the discharge pipe 35 and is discharged from the jacket through a pipe 61 connected to the jacket above the pipe 60. Under certain circumstances it may be desirable to utilize the heat of the exhaust from the motor for imparting additional heat to the water discharged by the pump and this maybe accomplished by passing the discharge from the pump through an exhaust heater either before or after the passage of the water through the jacket of the motor. To this end the exhaust pipe of the motor is directed into a closed heater-casing 71 containing a coil of pipe 7 Qthrough which the water may be circulated. The coil 7 2 is connected at its lower end to the discharge pipe 35 of the'pump and at its upper end with the pipe 60. The flow of water is directed either through the exhaust heater or directly into the pipe 60 by a two-way valve 73 located at the junction of the pipe 35 with the coil 72, as shown clearly in Fig. 2 of the drawings. In addition, a second'coil of pipe 76 is located in the heater casing 71 and is connected at opposite ends with the pipe 61 leading from the water jacket of the motor. The flow of water'through the coil 7 6 is controlled by a two-way valve 77. The exhaust gases after heating the coils 7 2 and 76 are discharged from the casing 71 through an exhaust pipe 78. This construction provides three separate and alternative methods of heating the water by the proper manipulation of the valves 73 and 77. First, the water may be caused' to flow directly from the pump into the water jacket of'the motor and from there to the point at which it is to beused. Second, the water may be directed through the coil of pipe 72 and thence to the water jacket of the motor; and third, the. water may be led directly to the water jacket of the motor and thenceto the coil of'pipe 76.1 These connections en able the temperature of thewater to be regulated within the desired limits.

WVhile it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader fea .tures of the invention. 7 5 T 7 The invention having been' described, what is claimed is 1. Apumping unit comprising a motor having a crankcase and crankshaft journaled therein, a pump piston rigidly secured to the under side of the crank case and having intake and discharge passages formed therein, a cylinder sliding upon the piston, and connections between the cylinder and crank shaft of the motor to reciprocate the cylinder upon the piston.

2. A pumping unit comprising a motor having a crank case and crank shaft journaled therein, means for supporting the motor in an elevated position, a vertical pump piston secured to the under side of the crank case and having intake and discharge passages formed therein, a cylinder sliding upon the piston, and connections between the cylinder and crank shaft of the motor to reciprocate the cylinder upon the piston.

3. A pumping unit comprising a motor having a crank case and crank shaft journaled therein, means for supporting the motor in an elevated position, a pump piston secured to the under side of the crank case and having intake and discharge passages formed therein, a cylinder sliding upon the piston and having trunnions extending from opposite sides, and driving links journaled upon the trunnions and connecting the cylinder with the crank shaft of the motor.

4. A pumping unit comprising a motor having a crank case and crank shaft journaled therein, means for supporting the motor in an elevated position, a pump piston secured to the under side of the crank case and extending downwardly therefrom, a cylinder sliding upon the piston and having the lower end sealed, a flexible bufier member received in the lower end of the cylinder, and connections between the cylinder and crank shaft of the motor to reciprocate the cylinder upon the stationary piston.

GEORGE D. LOUD. 

